The 83(b) Election Explained

The 83(b) election is one of the most consequential one-page filings in early-stage tax. Filed correctly within 30 days of receiving unvested founder stock or early-exercising an option, it locks in tax treatment that can be the difference between a large ordinary-income hit on each vesting date and zero current tax with capital-gain treatment on a future sale. Filed late, or not at all, it is unavailable, with no general remedy.

This insight explains what the election does, when the deadline runs, what happens at the deadline, the post-2025 filing practice, and the QSBS-clock interaction that founders consistently overlook.

The Default Rule Without an 83(b) Election

Under 26 U.S.C. § 83(a), when property is transferred to a person in connection with the performance of services and the property is subject to a substantial risk of forfeiture (most commonly, vesting), the recipient does not recognize income at transfer. Income is recognized instead on each date the property vests, in an amount equal to the fair market value at vesting minus any amount paid for the property. That income is ordinary compensation income, taxed at the recipient's marginal rate.

For a founder who issued stock at $0.0001 per share at formation and watches the company grow into a $500 million business over four years, the default rule means the founder owes ordinary income tax on each vesting tranche, computed at the then-current fair market value. The tax bill scales with the company's success. The founder usually has no liquid stock to sell to fund the tax. This is the classic founder-equity tax disaster.

What the 83(b) Election Does

Under 26 U.S.C. § 83(b), the recipient may elect to recognize income at the time of transfer rather than at each vesting date. The income recognized is the fair market value at transfer minus any amount paid. The election is irrevocable.

For founder stock issued at fair market value (typically par, a few thousandths of a cent per share, at incorporation when the company has no enterprise value), the spread is zero. The 83(b) election therefore produces zero current ordinary income tax. The founder's tax basis is set at the purchase price. The holding period for long-term capital gains and for QSBS under Section 1202 begins on the date of transfer.

From that point forward, all appreciation in the stock is capital gain on disposition. The default-rule outcome (ordinary compensation on each vesting date) is replaced with capital-gain treatment on the eventual sale. For a successful exit, the after-tax difference is enormous.

The 30-Day Deadline

The election must be made within 30 days of the date the property is transferred to the recipient. 26 U.S.C. § 83(b)(2). The deadline is statutory. The IRS treats it as jurisdictional. The Tax Court and the federal courts of appeals have consistently refused to apply equitable tolling or grant relief for late filings, even when the failure was the result of attorney error, mail-handling problems, or transparent good faith.

For founders, the date of transfer is the date the founder stock purchase agreement is executed and the consideration is paid (cash, services where permitted, or contributed property). For an early-exercised stock option, the date of transfer is the date of exercise. For a restricted stock unit (RSU) that converts to restricted stock, the date of transfer is the date of conversion.

The 30-day clock runs from the day after the date of transfer, consistent with the federal default counting rule. So if stock is issued on April 1, the election must be received by the IRS (or postmarked, depending on filing method) no later than May 1. The 30-day window does not pause for weekends or federal holidays unless the 30th day falls on a weekend or holiday, in which case the deadline rolls to the next business day under the default federal due-date rules. Because the deadline is statutory and jurisdictional, conservative practice is to file well before the 30-day boundary rather than relying on the final business day.

What Happens If You Miss the Deadline

If the election is not made within the 30 days, it is unavailable. The recipient is taxed under the default rule of Section 83(a). There is no general fix.

A handful of edge cases exist where a fix may be available, but each is narrow:

• If the stock was never actually transferred for tax purposes (e.g., the stock certificate was issued and the consideration was paid, but the parties later determine the transfer was incomplete), the 30-day window may not have started.
• If the transferred stock is later forfeited because the service provider departs before vesting, IRC § 83(b)(1) flush language provides that no deduction is allowed for the income previously recognized under the election, and 26 C.F.R. § 1.83-2(a) treats the forfeiture as a sale or exchange in which the recipient realizes a loss equal to the amount paid for the property minus the amount realized on forfeiture (often zero). The income tax already paid on the value at grant is not recoverable through deduction; the recipient’s only tax remedy is the limited capital loss on the forfeited property.
• If the underlying transaction is restructured before the 30-day window expires (e.g., the original grant is canceled and a new grant is issued), the new transfer creates a new 30-day clock.

Outside those narrow circumstances, the missed deadline is final. The Tax Court has rejected requests for equitable relief in cases involving even compelling factual circumstances. The 30-day rule is not the kind of deadline that gets extended.

The QSBS Holding-Period Interaction

For founders who care about Section 1202 (and they should; see our companion QSBS insight), the 83(b) election is also a QSBS planning tool.

When founder stock is unvested and no 83(b) is filed, each vesting tranche is treated as transferred for tax purposes only on the vesting date. For QSBS purposes, the five-year holding period therefore starts on each vesting date, not on the original issuance date. A founder with four-year vesting would not reach QSBS-eligibility on the final tranche until nine years after formation: five years past the vesting date, which is itself four years past formation.

With a timely 83(b) election, the entire grant is treated as transferred on the issuance date, and the QSBS five-year clock starts on issuance. The founder reaches QSBS-eligibility five years after formation, on every share.

The math: missing the 83(b) on a venture-stage company with a five-plus-year exit horizon means giving up Section 1202 treatment on roughly 75 percent of the founder's stock (the three-fourths that vests after year one), in addition to the ordinary-income tax exposure on each vesting date. The combined cost is, for many successful exits, the largest single avoidable tax loss in the founder's career.

The Filing Mechanics in 2026

The 83(b) election filing must include:

• The taxpayer's name, address, and taxpayer identification number
• A description of the property (e.g., "1,000,000 shares of common stock of [Company], par value $0.00001 per share")
• The date the property was transferred and the taxable year for which the election is made
• The nature of the restriction (e.g., four-year vesting with one-year cliff, subject to repurchase at original cost on departure)
• The fair market value of the property at transfer, computed without regard to the restriction
• The amount paid for the property
• The amount to be included in gross income (the spread)
• A statement that copies of the election have been furnished to the issuer

Filing options as of 2026:

• U.S. Postal Service certified mail with return receipt to the IRS service center where the taxpayer files the federal income tax return. Certified mail is the historical safe path; the postmark is conclusive evidence of timely filing.
• Filing options. The IRS released Form 15620 in November 2024 as a standardized, optional paper template for the 83(b) election; it is filed by mail with the IRS service center designated for the taxpayer. Some commercial cap-table providers offer assisted filing services that prepare and mail the election on the taxpayer's behalf, but those services are agents of the taxpayer rather than IRS-operated portals. Practitioners generally default to U.S.P.S. certified mail because the postmark and return-receipt trail is unambiguous.

The filer should retain (i) the postmark receipt or electronic submission confirmation, (ii) the IRS-stamped copy of the election (returned by the IRS in due course), (iii) a copy of the election filed with the company, and (iv) a memo to the file documenting the date of transfer, the consideration paid, and the basis used.

The 2016 amendments to Treas. Reg. § 1.83-2(c) (T.D. 9779, 81 Fed. Reg. 48,711 (July 26, 2016)) eliminated the prior requirement to attach a copy of the election to the recipient's return. The election remains a separate filing with the IRS within 30 days of transfer; the income recognized as a result of the election (typically zero for founder stock priced at FMV) is reported on the recipient's federal income tax return for the year of transfer in the ordinary course (Form W-2 wages for employees; Schedule C or other applicable schedule for non-employee service providers).

Where the 83(b) Comes Up Beyond Founder Stock

Three other recurring 83(b) contexts in venture practice:

Early-exercised options

An option that permits exercise before vesting (common in founder-friendly equity incentive plans) creates a fresh 30-day window on each early-exercise date. The exercising option holder receives unvested restricted stock and can elect under Section 83(b) to be taxed on the spread at exercise rather than at each vesting date thereafter. The QSBS clock for the early-exercised stock begins at exercise.

Restricted stock issued to employees and advisors

Equity incentive plan grants of restricted stock (not options, but actual restricted shares) trigger Section 83(a) on each vesting date by default. The recipient can elect under Section 83(b) within 30 days of the grant to be taxed at grant rather than at each vesting date. For low-FMV grants this is often a no-brainer; for high-FMV grants the math depends on growth expectations.

Stock issued for promissory notes

Stock issued in exchange for a promissory note (rare in modern practice; more common in early-2000s structures and in some founder-equity loans) raises specific 83(b) questions about whether the note constitutes "consideration paid" under Section 83 and how a non-recourse note interacts with the election. Specific counsel before the 30-day deadline is essential.

What Founders and Employees Should Do

1. Evaluate an 83(b) election at every transfer of unvested stock. For founders at formation when the FMV is at par, the election is generally the right call as a tax-planning matter. For employees and advisors receiving restricted stock, the analysis is more fact-dependent and turns on the FMV at grant and the expected growth profile. Specific elections require case-by-case review with a qualified advisor.
2. Calendar the 30-day deadline the day the stock is transferred. Set a reminder for day 25 to confirm filing.
3. File by certified mail with return receipt. Save the postmarked receipt and the stamped copy returned by the IRS.
4. Furnish a copy to the issuer. The corporate record should include a copy of every 83(b) election filed by founders, employees, and advisors.
5. Document the FMV used. A short memo to the file explaining how FMV was determined (typically zero spread on founder stock at par; for later grants, the most recent 409A) prevents later auditing problems.

For background on how the 83(b) discipline fits into the broader equity-compensation framework (formation, founder stock purchase agreements, equity incentive plans, 409A valuations, and QSBS), see our long-form guide on Setting Up a Venture: Formation, Capitalization, and Term Sheets and our companion insights on QSBS and 409A valuations.

Frequently Asked Questions